_base_ = ["grid_rcnn_r50_fpn_gn-head_2x_coco.py"]
# learning policy
lr_config = dict(
    policy="step", warmup="linear", warmup_iters=500, warmup_ratio=0.001, step=[8, 11]
)
checkpoint_config = dict(interval=1)
# runtime settings
runner = dict(type="EpochBasedRunner", max_epochs=12)
